FNUS76 KPDT 081743
FWSPDT

SPOT FORECAST FOR CACHE CREEK...USFS WWF
NATIONAL WEATHER SERVICE PENDLETON OR
1043 AM PDT SAT SEP 8 2012

FORECAST IS BASED ON REQUEST TIME OF 1013 PDT ON SEPTEMBER 08.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

...ISOLATED SHOWERS AND THUNDERSTORMS SUNDAY MORNING...
...FIRE WEATHER WATCH IN EFFECT FROM SUNDAY MORNING THROUGH MONDAY
EVENING FOR WIND AND LOW RELATIVE HUMIDITY...

.DISCUSSION...WARM AND DRY CONDITIONS WILL PREVAIL TODAY DUE TO HIGH
PRESSURE ALOFT. A LOW PRESSURE SYSTEM WILL BRING ISOLATED SHOWERS
AND THUNDERSTORMS INTO THE AREA BETWEEN 0500 AND 1400 SUNDAY. THIS
CONVECTIVE ACTIVITY COULD PRODUCE GUSTY OUTFLOW WINDS UP TO 45 MPH.
ABUNDANT LIGHTNING IS NOT EXPECTED BUT OCCASIONAL CLOUD-TO-GROUND
STRIKES WILL BE POSSIBLE. VERY LITTLE IF ANY RAIN WILL BE OBSERVED.
WINDS WILL SHIFT TO THE WEST AND INCREASE SIGNIFICANTLY ON SUNDAY
AFTERNOON. THE COMBINATION OF CRITICALLY DRY FUELS...STRONG WINDS
AND LOW RELATIVE HUMIDITY COULD CAUSE EXTREME FIRE BEHAVIOR AND
GROWTH ON BOTH SUNDAY AND MONDAY.

***THUNDERSTORMS IMPLY GUSTY AND ERRATIC WINDS***
***WINDS ARE 20 FOOT 10 MINUTE AVERAGES***
***CWR-CHANCE OF WETTING RAIN 0.10 OR GREATER***
***FORECAST IS VALID FOR 12 HOURS AFTER ISSUANCE***

.TODAY...

SKY/WEATHER.........SUNNY.
CWR.................0.
MAX TEMPERATURE.....74-84 RIDGETOPS...84-94 VALLEYS.
MIN HUMIDITY........10-18 PERCENT RIDGETOPS...7-13 PERCENT VALLEYS.
WIND (20 FT)........UPSLOPE/UPVALLEY WINDS 3 TO 8 MPH WITH GUSTS
                    AROUND 15 MPH.
RIDGETOP WIND.......SOUTHWEST 5 TO 10 MPH WITH GUSTS AROUND 15
                    BECOMING SOUTHEAST 8 TO 12 MPH WITH GUSTS AROUND
                    20 MPH IN THE AFTERNOON.
MIXING HEIGHT.......NEAR SURFACE INCREASING TO 8000 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST 3 TO 6 MPH.
LAL.................1.
HAINES INDEX........3 (VERY LOW).

.TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY.
CWR.................0.
MIN TEMPERATURE.....55-65 RIDGETOPS...45-55 VALLEYS.
MAX HUMIDITY........20-30 PERCENT RIDGETOPS...40-50 PERCENT VALLEYS.
WIND (20 FT)........UPSLOPE/UPVALLEY WINDS 4 TO 9 MPH BECOMING
                    DRAINAGE 2 TO 5 MPH AFTER SUNSET.
RIDGETOP WIND.......SOUTH-SOUTHEAST 6 TO 12 MPH WITH GUSTS AROUND 20
                    MPH.
MIXING HEIGHT.......8000 FT AGL DECREASING TO NEAR SURFACE AFTER
                    MIDNIGHT.
TRANSPORT WINDS.....SOUTHEAST 3 TO 9 MPH.
LAL.................1.
HAINES INDEX........4 (LOW).

.SUNDAY...

SKY/WEATHER.........PARTLY CLOUDY. A SLIGHT CHANCE OF SHOWERS AND
                    THUNDERSTORMS BETWEEN 0500 AND 1400.
CWR.................10.
MAX TEMPERATURE.....70-80 RIDGETOPS...80-90 VALLEYS.
MIN HUMIDITY........17-25 PERCENT RIDGETOPS...10-18 PERCENT VALLEYS.
WIND (20 FT)........UPSLOPE/UPVALLEY WINDS 5 TO 10 MPH BECOMING WEST
                    WINDS 8 TO 14 MPH WITH GUSTS AROUND 25 MPH IN
                    THE AFTERNOON.
RIDGETOP WIND.......SOUTHWEST 8 TO 14 MPH WITH GUSTS AROUND 25 MPH
                    BECOMING WEST 12 TO 20 MPH WITH GUSTS AROUND 30
                    MPH IN THE AFTERNOON.
MIXING HEIGHT.......NEAR SURFACE INCREASING TO 7000 FT AGL IN THE
                    AFTERNOON.
TRANSPORT WINDS.....SOUTHWEST 5 TO 15 MPH.
LAL.................2.
HAINES INDEX........3 (VERY LOW).

$$
FORECASTER...RACHEL TRIMARCO
REQUESTED BY...AMANDA JOHNSON
TYPE OF REQUEST...WILDFIRE
.TAG 20120908.CACHE.01/PDT